Induction coil



April 2, 1935. 1,996,729 a. RIGANTE. NOW BY JUDICIAL CHANGE OF NAME J. R. RIGANDI INDUCTION COIL Filed March 18, 1933 2 Sheets-Sheet l INVENTOR WITNESS:

April 2, 1935.

G. RIGANTE, NOW BY JUDICIAL CHANGE OF NAME J R.

0 9 w 9 mm W w M r w, M H i M 6 A q {w m m f 5 m R m 6. MW w m A IIIIII -w h wwfl yo 5 2 i C i l ii C 4 HUM NIH H W W E m a 1 W8, mm H 0 m WW 1 W @f n r l 4 l l ww V NM .J lfil| m I 1: 7d W Patented Apr. 2, 1935 UNITED STATES PATENT OFFICE nmuc'rron con.

Giuseppe pans, Weltefleigh, N. n, m by Judicial change of name Joseph Ruig llgandi Application March 1a, was, sen-i No. 1.5.:

1 Claim. (01. 175-8) The present invention relates to new and usecentrically with the core II and with each other. ful improvements in coil structures and more The reference numeral ll designates a coil which particularly it pertains to induction coils. is wound upon the core ll. The reference nu- It is an object of the invention to provide a new merals l1 and II designate coils wound upon the 5 and improved coil structure wherein a plurality cylindrical member II said coils i1 and II being 5 of induction coils may be combined in a single separated by the outer cylindrical member l5. unit. The reference numeral 20 designates a shield It is a further object of the invention to proand said shield isformed with a. top wall 2| which vide a new and novel structure whereby a tuning has a depression 22 therein. The bolt l2 hereof the coil may be accomplished. toi'ore mentioned has an extended end 23 which 10 Still a further object of the invention resides in is threaded and this and receives a nut 24 which the provision of means for completely shielding through the medium of an insulating element the coils. 2i clamps the lower wall of the depressed por- Still a further object of the invention resides tion in order to secure the coil member to the top in the provision of a single support for the coil wall of the shield 2|. The shield also has a base 15 and the shield. portion 2! to which it is secured as at 21 and a Other objects of the invention will appear as bottom wall through which the threaded exthe nature of the invention is better understood. tension 2! extends. An insulating member 30 Reference will be had to the accompanying similar to the one heretofore described is carried 20 drawings, wherein; by the bolt [2 and a nut II serves to secure the 20 Figure l is a longitudinal sectional view of a lower end of the bolt to the bottom wall 28 coil constructed in accordance with one form through the medium oi said insulating member of the invention, 20. The supporting base 26 may have a flange 32 Figure 2 is a transverse sectional view taken on by which it may be adapted to a suitable sup- 26 the line 22 of Figure 1. porting member such as a panel, baseboard or Figure 3 is a longitudinal sectional view illussimilar device. trating a, slightly modified form of the lnven- Mounted upon thebolt i2 thereisa metal plate tion, I and interposed between this metal plate 35 and Figure 4 is a longitudinal sectional view illusthe top wall 2| of the shield there is a dielectric so trating a still further modified form or the melement a. A spring :1 tends to force the divention, I electric element IO and the plate outwardly Figure 5 is a longitudinal sectional view illusagainst a nut I. which is threaded upon the end trating a still further modified form 01' the in- 22 of the bolt l2. vention, By adjustment of the nut '82 and the consequent 86 Figure 6 is a longitudinal sectional view illuspositioning of the plate SI of the dielectric ele- 35 trating a further modified form of the invenment II with respect to the several coils the latter tion the coil in this form of the invention being my be tuned. provided with posts by means of which it may be In the modified form of the invention shown removably attached to a suitable socket element. in Figure 3 the reference numeral 40 designates 40 Figure 7 is a longitudinal sectional view of a the core. This core has a base 4| which is pro- 40 still further modified form of the invention, and; vided with a plurality of annular shoulders 42 Figure 8 illustrates a modified form oi the into which a plurality of cylindrical members 43 vention in which a plurality o1 coils are mounted may be attached by screws or the like 44. The in axial alignment within a common shield buildseveral coils are formed upon the cylindrical 45 ing up a plurality of units. members and upon the core as in the form illus- 45 Referring to Figures 1 and 2 01' the drawings, trflted in m 1 1nd the device comprises a core member ll having and A shield ll surrounds this coil structure and members II. The core member I. has a bolt 12 said shield is of substantially the same construcpassed therethrough and nuts ll upon the bolt l2 tion as that heretofore described. In this form serve to hold the end members in contact with of the invention. however, the core 40 rests di- 50 the ends oi the core It. The end members ii are rectly upon the bottom wall 41 oi the shield and provided with grooves or channels I I and these said core has a head extension 48 which is enchannels are adapted to receive cylindrical mem- Based in an opening in the bottom wall of the bers it formed oi suitable material the cylindridepressed portion 22 o! the shield, the same be- 66 cal members I5 being preferably arranged cons inserted t r ugh a key slot and turned. In

5 the invention. 1

The operation of this form of the invention substantially the same as that form illustrated in Figure l. V

The coil illustrated in Figure 4 is slightly. different in construction in that the core member I5 is held between the end members 55 and 5| of the shield 52. For this purpose the end walls 50 and 5| are provided with depressed portions 53 in which channels 55 for the reception of the cylindrical members 55 are formed. The shield 52 in this form of the invention is substantially.

the same as that heretofore described except as for its end walls. In this form of the invention, however, there is no tuning means provided.-

In this last described form of the invention the several leads for the coils have been illustrated as extending through openings 55 in the side wall of the shield and it is to be understood, thatalthough this construction is not illustrated in each of the forms of the invention, this construction may be employed in connection with each of the coils herein illustrated. The reference numeral 51 designates a strip of insulating material suitably secured to the interior of. the shield 52 and serves to prevent electrical contact between the leads of the shield;

In that form of the invention illustrated in Figm'e 5 of the drawings the shield is designated 50 and has a depressed portion 5| in its top wall which is considerably deeper thanthe depressed portion in the other forms previously described. The core member 52 is secured to the bottom wall of this depressed portion 5| by a spool like member 53 upon which a coil 55 is wound, the bottom wall of the depressed portion 5| being clamped between the spool like member 53 and the core 52 by means of a nut 55 threaded upon the end 55 of a bolt 51 which passes through the core member 52, the bottom wall of the depressed portion 5| and the spool member 53. In this form of the invention the cylindrical members'are designated 58 and each has an end wall 59 through which the bolt passes, the cylindrical members being separated by a suitable. .insulatinglelement 59'. In this form of the invention the coils are wound upon the core member 52 and the cylindrical members 58, the leads extending through openings in the casing as heretofore described but not shown in this figure. In this last described form of the invention the core member, cylindrical members and the coils carried thereby are held suspended from the bottom wall of the depressed portion 5| and within the shield 50.

In the form of the invention illustrated in Figure 6, the core member. 10 is provided with a' shoulder 1| upon which the cylindrical member 12 is mounted, the shield 13 being mounted upon a shoulder 14 of the coremember. has a depressed-portion 15 which has a key way slot to receive the head 15 of the core member 10 and a manipulating handle I1 is secured to The shield the head member I5 of the core 10. In this form one end of the core member 10 forms the closure for one end of the shield 13. Upon this end of the core member 10 there is a plate 18 which carries a plurality of prongs 19 which form the terminals for the leads from the coils l8 and 19' formed respectively on the core 10 and the cylindrical member 12.

The form of the invention illustrated in Figure 7 is substantially the same as that illustrated in Figure 6 except that there are a plurality of cylindrical members and 9|, the base of the core 10 being formed with a plurality of shoulders 82 and 83 upon which the cylindrical members 80 and 8| are respectively mounted. Prongs 19 form the terminals of the coil leads in this form of the invention.

In Figure 8 I have shown three coil units mounted in a single shield. The shield comprises three sections 98, 9| and 92. The shields 95 and 92 each have a closed end 93 and an open end 94. The coils are formed. upon cylindrical members 95 of which there may be any desired number, which are supported as heretofore described. The shield 9| has two open ends and the open ends of the shields and 92 are adaptedto be positioned in end,to end relation with the open ends of the shield 9|. Partition plates are employed to close both the open end of the shields 90 and 92 and both open ends of the shield 9|.

The coilmounted within the shield 90 is suspended from the upper wall 93 thereof by a bolt 91. The coil mounted within the shield 92 is supported from the closed bottom thereof by means of a bolt 98 and the coil mounted within the shield 9| is clamped between the partition plates 95 by a bolt 99. By this construction it is apparent that the several coils are shielded from outside interference and from each other, and it is to be understood that the leads from these several coils will extend through the shields preferably in the same manner as illustrated in Figure 4 of the drawings.

From the foregoing it will be apparent that the present invention provides new and novel coil structures in which a plurality of coils may be carried by-a single support and by which an effective shielding of the several coils is had.

Having thus described the invention, what is claimed as new and 'what it is desired to secure by Letters Patent of the United States, is:

A coil structure comprising in combination, a core of non-conducting material, a plurality of spaced cylindrical members carried by said core, a coil formed on said core, a coil on each of said cylindrical members, a shield completely enclosing said core and said cylindrical members, said shield having a depressed recess in one of its end walls, the bottom wall of said recess having an opening therein, and means carried by the core and adapted for reception in the opening in the bottom wall of the depressed recess for securing the core and the shield together. V V

GIUSEPPE RIGAN'I'E. 

